PowerShell Plus - Learn how to learn and master PowerShell fast with an interactive learning center, a powerful IDE, pre-loaded scripts, and a PowerShell Editor… all for free.
WinDirStat - WinDirStat is a disk usage statistics viewer and cleanup tool, inspired by KDirStat.
PowerGui - A graphical user interface and script editor for Microsoft Windows https://alternativeto.
TreeSize - TreeSize tells you where precious disk space has gone to.
CentminMod - Centmin Mod is a LEMP stack shell menu based auto installer.
SpaceSniffer - SpaceSniffer is a freeWare (donations are welcome) and portable tool application that lets you understand how folders and files are structured on your disks.